微机原理8253 发光二极管答:CONTPORT EQU 00DFH DATAPORT EQU 00DEH DATA1 EQU 0500H START:JMP TCONT TCONT:CALL FORMAT CALL LEDDISP MOV DX,TCONTRO MOV AL,0B6H OUT DX,AL MOV DX,TCON2 MOV AL,00 OUT DX,AL MOV AL,10H OUT DX,AL HLT LEDDISP:MOV AL,90H MOV DX,CONTPORT OUT DX,AL MOV BYTE PTR D...